Residual income is calculated asQuestion $7$ Select one:a$.$Operating income $+($average operating assets$/$project$\text{'}$s actual capital rate$)$cross outb.Operating income $-($average operating assets x firm's minimum capital rate$)$cross outc.Operating income $-($average operating assets x project's actual capital rate$)$cross outd.Operating income $+($average operating assets$/$firm$\text{'}$s minimum capital